jmarreros

This Plugin allows to use an external image as Featured Image, this can be especially useful if you house your images in another location.
This Plugin is compatible with Nelio External Featured Image Metadata, so you can reuse your data in case you want to uninstall Nelio Plugin.

External URL Featured Image

It is what I was looking for: simplicity.

$external_image = get_post_meta( $post->ID, '_dcms_eufi_img', true );

Works well for me

Use an external url image as Featured Image for your posts, pages, and other kind of post types.

Pawel Cmachowski

Plugin is extension for WooCommerce plugin.
Plugin allows you to create multiple External / Affiliate product URLs and buttons text.
Plugin creates extra fields on External / Affiliate product edit form, with repeater of multiple external URLs. 
Also, plugin gives you ability to open external / affiliate URLs on new window.
Features:
<ul>
<li>Ability to create multiple buttons with external / affiliate URLs</li>
<li>Ability to open external / affiliate URLs in new window – configuration per product</li>
<li>Ability to display additional external / affiliate URLs on shop/category page – configuration per product</li>
<li>Ability to change additional button templates by hooks – <code>mepu_woo_product_page_template</code> and <code>mepu_woo_shop_page_template</code></li>
</ul>

Multiple external product URLs for WooCommerce

Thanks

Plugins gives you ability to add multiple external product URLs on WooCommerce product edit page.

External URL Featured Image vs Multiple external product URLs for WooCommerce